Convertible crib



FIG. 1 is an environmental perspective view of a convertible crib showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side elevational view with the left side being a mirror image thereof; and,

FIG. 5 is a top view thereof. 

The ornamental design for a convertible crib, as shown and described. 